A127303 A doubly-fractal simple sequence. Erase the first (leftmost) digit of every integer: what is left is the sequence itself. The erased digits, one by one, form also the sequence itself.

1, 2, 11, 12, 111, 212, 1111, 1212, 11111, 21212, 111111, 221212, 1111111, 1221212, 11111111, 11221212, 111111111, 211221212, 1111111111, 2211221212

Offset

1,2

Links

Table of n, a(n) for n=1..20.

Crossrefs

Cf. A127199, A127204, A127274.

Sequence in context: A117547 A037091 A289675 * A378841 A286153 A068972

Adjacent sequences: A127300 A127301 A127302 * A127304 A127305 A127306

Keyword

base,nonn

Author

Eric Angelini, Mar 27 2007

Status

approved